Client Side

Gruff provides a Graphical Query View which allows creating SPARQL and Prolog queries as diagrams of nodes and links. Group graph patterns such as UNION and OPTIONAL can be laid out as grouper boxes that can be nested to any level, with proper nesting maintained automatically. You can generate a visual graph from query results, showing the network of triples in the query results.

Semantic Web Client Library, represents the complete Semantic Web as a single RDF graph and enables applications to query this global graph using SPARQL queries. Implemented in Java based on Jena.

Sesame Windows Client, is an open-source desktop application for interacting with a Sesame 2 RDF server or SPARQL endpoints. SWC offers a graphical user interface that lets you administrate a Sesame server, do SPARQL queries, export, add and remove data. It works with Novell Mono on Unix.

TopQuadrant's TopBraid Composer, is a complete standards-based platform for developing, testing and maintaining Semantic Web applications. Testing, consistency checking and debugging is supported by a bundled version of Pellet.

Twinkle is a simple GUI interface that wraps the ARQ SPARQL query engine. The tool should be useful both for people wanting to learn the SPARQL query language, as well as those doing Semantic Web development.

SPARQL::Client gem is a client library for accessing SPARQL 1.1 Query and Update endpoints written in pure Ruby with a free and unencumbered public domain software license. Documentation available on GitHub.

SOR "is a high-performance OWL ontology storage, inference, and query system based on RDBMS (Relational Database Management Systems). This technology runs on Windows® and Linux®." "SPARQL specification (April 2006) has been implemented". Developed by IBM. Previously known as The Minerva.

OpenLink Virtuoso supports SPARQL, and SPARQL embedded in SQL, for querying RDF data stored in Virtuoso's Object-Relational Database. In Virtuoso, SPARQL benefits from low-level support in the core engine via features such as; SPARQL aware type casting rules and a dedicated IRI data type. The Virtuoso RDF Triple Store is the fastest developing functionality realm of Virtuoso at the current time. Virtuoso Open Source (license: GPL) and Commercial Editions (version 4.5.2) are now Available.

D2R Server, turns relational databases into SPARQL endpoints, implements the SPARQL query language and the SPARQL protocol, based on Joseki and ARQ.

dlvhex SPARQL-engine A prototype SPARQL-plugin for the declarative logic programming engine dlv. Translates SPARQL to datalog rules. The generic translation, also applicable to other Datalog or logic programming engines is described in a detailed Technical Report

Hercules is a semantic web framework in JavaScript. It has a SAPRQL query engine implementation in pure JavaScript which is runnable on web browsers. Hercules is distributed on the public domain.

4store is is a clustered database storage and query engine that holds RDF data. 4store's main strengths are its performance, scalability and stability. It does not provide many features over and above RDF storage and SPARQL queries. 4store is available under the GPLv3 license.

Bigdata(R) Bigdata is an open-source, high-performance semantic web database platform supporting SPARQL, SPARQL 1.1, and RDFS+ inference. Deployment models are available for embedded applications, standalone server processes, highly available replicated clusters based on the standalone database platform, and a horizontally scaled "bigdata federated" using dynamic sharding to distributed the data over a cluster. The bigdata platform was created in 2006 and has been under continuous development since that time. Development is lead by SYSTAP, LLC. The platform is available under its open source license (GPLv2) or an evaluation license. Commercial licenses are available through SYSTAP, LLC and through a number of OEMs. Download at https://sourceforge.net/projects/bigdata/. See http://www.systap.com/bigdata.htm for more information about licensing. Support is available under both the open source and commercial license models.

The SPARQL gem is a complete SPARQL 1.1 Query and Update implementation written in pure Ruby with a free and unencumbered public domain software license. Documentation available on GitHub (Implementation Report).